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Gas Fireplace Overview:  

Direct  Vent


Direct Vent Gas Fireplaces are vented through a pipe directly out the wall of the home, sort of like a dryer vent.  They may also be placed in the center of the room and vented through the roof. 

They’re very energy-efficient and create a lot of heat.  They are airtight, sealed systems that draw in air from the outside and expel combustion gases outside--so they don’t pull oxygen out of the room or exhaust hazardous gases into the home.  The flames are sealed behind a glass door. 

Air to heat the room is drawn in and expelled through a separate system independent of the combustion chamber.  Optional remote controls and blowers are available.


Ventless (or Unvented) Gas Fireplaces do not require a chimney or any pipe.  They burn fairly clean and, like a gas range, don’t need to vent their gases outside if they are tuned and working properly. 

Homeowners may need to open a window while these units are operating to provide oxygen, and if the ceramic logs are incorrectly positioned, the flame may generate hazardous chemical fumes.  

Unvented (or Ventless) systems have Oxygen Depletion Sensors, which shut off the gas flow if the oxygen level drops to unsafe levels.  Unfortunately, such sensors clog easily and have to be blown clean periodically.

Gas Logs

Gas Logs are used by homeowners who have an existing wood-burning fireplace that they’ve converted to gas. They can be either vented or vent-free.

A Sand Pan Burner is a type of Gas Log set.

Gas Logs usually supply some radiant heat but are used mainly for decoration.  There are a wide range of logs available such as birch, oak and split wood.

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